Tread having offset first and second incisions

Details Tread having offset first and second incisions Tread having offset first and second incisions

2005-04-05

2005-04-05

Maki, Steven D. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209180, C152S209220, C152S209230, C152SDIG003

Reexamination Certificate

active

06874552

ABSTRACT:
A tire tread comprising grooves defining motifs in relief, at least one of these motifs being provided with first and second incisions, said incisions each being defined by two main lateral surfaces connected by an end surface, each of the first incisions opening on to the running surface of the tread when new and extending at most as far as the depth, and each of the second incisions extends at least as far as the depth. The tread is characterized in that the bottom surfaces of the first incisions and the apex surfaces of the second incisions are functionally arranged such that, whatever the level of wear the length of the ridges on the running surface is at least equal to 75% of the length of the ridges when new.

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U.S. Appl. No. 09/450,255, of Labareyre et al., filed Sep. 24, 2002.

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